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DaveTheNewbie
Combined EC of the runoff was .15? If that's the case then you leached out all the nutes and you need to feed them with an EC of 1.2 pH 5.5-6.0 before they start starving and you have more problems.
its a week till harvest and a little flush wont do them any harm, the blumat will kick in soon and all will be back to normal.
(famous last words)
Hey Dave
Far from an expert here but I can tell you what worked for me without flushing. I ran Lucas in coco which was a big improvement from when I just followed label directions. I still had issues like you are. Then I read that Lucas has to be one third strength in coco or soiless...or you can feed every third watering. I had no more deficiencies or lockouts after.
cant feed every third watering with the system I have, but im running about 1/2 strength. Your not the first to suggest that may still be a bit high. Especially in this heat when they are sucking down the water. I think I will experiment with this a bit.